The Achilles tendon connects the muscles in your calf to the back of your foot. When you are sprinting, your Achilles tendon alternately stretches, as you bring your weight down onto your forward foot, and contracts to push you off the ground. A 70 kg runner has an Achilles tendon that is 15 cm long with a typical 1.1Ã10^â4m^2 area. typical values for a person of this size. Required:
a. By how much will the runner's Achilles tendon stretch if theforce on it is 8.0 times his weight?
b. What fraction of the tendon's length does this correspond?

Why are graphs useful when interpreting data

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?